| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.bouncycastle.crypto.digests; |
| |
| import org.bouncycastle.crypto.Digest; |
| |
| /** |
| * Level of indirection to let us select OpenSSLDigest implementations |
| * for libcore but fallback to BouncyCastle ones on the RI. |
| */ |
| public final class AndroidDigestFactory { |
| private static final String OpenSSLFactoryClassName |
| = AndroidDigestFactory.class.getName() + "OpenSSL"; |
| private static final String BouncyCastleFactoryClassName |
| = AndroidDigestFactory.class.getName() + "BouncyCastle"; |
| |
| private static final AndroidDigestFactoryInterface FACTORY; |
| static { |
| Class factoryImplementationClass; |
| try { |
| factoryImplementationClass = Class.forName(OpenSSLFactoryClassName); |
| // Double check for NativeCrypto in case we are running on RI for testing |
| Class.forName("com.android.org.conscrypt.NativeCrypto"); |
| } catch (ClassNotFoundException e1) { |
| try { |
| factoryImplementationClass = Class.forName(BouncyCastleFactoryClassName); |
| } catch (ClassNotFoundException e2) { |
| AssertionError e = new AssertionError("Failed to load " |
| + "AndroidDigestFactoryInterface " |
| + "implementation. Looked for " |
| + OpenSSLFactoryClassName + " and " |
| + BouncyCastleFactoryClassName); |
| e.initCause(e1); |
| throw e; |
| } |
| } |
| if (!AndroidDigestFactoryInterface.class.isAssignableFrom(factoryImplementationClass)) { |
| throw new AssertionError(factoryImplementationClass |
| + "does not implement AndroidDigestFactoryInterface"); |
| } |
| try { |
| FACTORY = (AndroidDigestFactoryInterface) factoryImplementationClass.newInstance(); |
| } catch (InstantiationException e) { |
| throw new AssertionError(e); |
| } catch (IllegalAccessException e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| public static Digest getMD5() { |
| return FACTORY.getMD5(); |
| } |
| |
| public static Digest getSHA1() { |
| return FACTORY.getSHA1(); |
| } |
| |
| public static Digest getSHA224() { |
| return FACTORY.getSHA224(); |
| } |
| |
| public static Digest getSHA256() { |
| return FACTORY.getSHA256(); |
| } |
| |
| public static Digest getSHA384() { |
| return FACTORY.getSHA384(); |
| } |
| |
| public static Digest getSHA512() { |
| return FACTORY.getSHA512(); |
| } |
| } |